Ejemplo n.º 1
0
 def NOtestall(self):
     t = Tyrant(host='127.0.0.1', port=1978)
     time1 = time.time()
     for i in range(1, 10000):
         key = "key%s" % i
         t[key] = {"firstname": "Alex", "lastname": "Madon", "age": "34"}
     time2 = time.time()
     dt = time2 - time1
     print "Tyran tc: %s" % dt
Ejemplo n.º 2
0
 def connect(self):
     """
     Connects to the database. Raises RuntimeError if the connection is not
     closed yet. Use :meth:`StorageAdapter.reconnect` to explicitly close
     the connection and open it again.
     """
     # TODO: sockets, etc.
     host = self._connection_options.get('host', DEFAULT_HOST)
     port = self._connection_options.get('port', DEFAULT_PORT)
     self.connection = Tyrant(host=host, port=port)
Ejemplo n.º 3
0
 def setUp(self):
     assert not os.path.exists(self.TYRANT_FILE), 'Cannot proceed if test database already exists'
     cmd = 'ttserver -dmn -host %(host)s -port %(port)s -pid %(pid)s -ext %(lua)s %(file)s'
     cmd = cmd % {'host': self.TYRANT_HOST, 'port': self.TYRANT_PORT,
             'pid': self.TYRANT_PID, 'file': self.TYRANT_FILE, 'lua': self.TYRANT_LUA}
     os.popen(cmd).read()
     self.t = Tyrant(host=self.TYRANT_HOST, port=self.TYRANT_PORT)
     self.t.clear() #Clear dirty data
     self.t.sync()
     self._set_test_data()
Ejemplo n.º 4
0
class StorageAdapter(BaseStorageAdapter):
    supports_nested_data = False
    converter_manager = converter_manager
    lookup_manager = lookup_manager

    #--------------------+
    #  Magic attributes  |
    #--------------------+

    def __contains__(self, key):
        return key in self.connection

    def __iter__(self):
        return iter(self.connection)

    def __len__(self):
        return len(self.connection)

    #----------------------+
    #  Private attributes  |
    #----------------------+

    def _fetch(self, primary_key):
        """
        Returns model instance for given model and primary key.
        Raises KeyError if there is no item with given key in the database.
        """
        return self.connection[primary_key] or {}

    #--------------+
    #  Public API  |
    #--------------+

    def clear(self):
        """
        Clears the whole storage from data, resets autoincrement counters.
        """
        self.connection.clear()

    def connect(self):
        """
        Connects to the database. Raises RuntimeError if the connection is not
        closed yet. Use :meth:`StorageAdapter.reconnect` to explicitly close
        the connection and open it again.
        """
        # TODO: sockets, etc.
        host = self._connection_options.get('host', DEFAULT_HOST)
        port = self._connection_options.get('port', DEFAULT_PORT)
        self.connection = Tyrant(host=host, port=port)

    def delete(self, key):
        """
        Permanently deletes the record with given primary key from the database.
        """
        del self.connection[key]

    def disconnect(self):
        self.connection = None

    def get_query(self, model):
        return QueryAdapter(storage=self, model=model)

    def save(self, data, primary_key=None):
        """
        Saves given model instance into the storage. Returns primary key.

        :param data: dict containing all properties to be saved
        :param primary_key: the key for given object; if undefined, will be
            generated

        Note that you must provide current primary key for a model instance which
        is already in the database in order to update it instead of copying it.
        """
        primary_key = primary_key or self.connection.generate_key()

        self.connection[primary_key] = data

        return primary_key
Ejemplo n.º 5
0
class TestTyrant(unittest.TestCase):
    TYRANT_HOST = '127.0.0.1'
    TYRANT_PORT = 1983
    TYRANT_FILE = os.path.abspath('test123.tct')
    TYRANT_PID = os.path.abspath('test123.pid')
    TYRANT_LUA = os.path.dirname(__file__) + '/test.lua'

    def setUp(self):
        assert not os.path.exists(self.TYRANT_FILE), 'Cannot proceed if test database already exists'
        cmd = 'ttserver -dmn -host %(host)s -port %(port)s -pid %(pid)s -ext %(lua)s %(file)s#idx=id:lex#idx=store:qgr#idx=color:tok#idx=stock:dec#'
        cmd = cmd % {'host': self.TYRANT_HOST, 'port': self.TYRANT_PORT,
                'pid': self.TYRANT_PID, 'file': self.TYRANT_FILE, 'lua': self.TYRANT_LUA}
        os.popen(cmd).read()
        self.t = Tyrant(host=self.TYRANT_HOST, port=self.TYRANT_PORT)
        self.t.clear() #Clear dirty data
        self.t.sync()
        self._set_test_data()
        self.q = self.t.query

    def tearDown(self):
        del self.t
        cmd = 'ps -e -o pid,command | grep "ttserver" | grep "\-port %s"' % self.TYRANT_PORT
        line = os.popen(cmd).read()
        try:
            pid = int(line.strip().split(' ')[0])
        except:
            'Expected "pid command" format, got %s' % line

        #os.popen('kill %s' % pid)
        os.unlink(self.TYRANT_FILE)
        try:
            os.unlink("%s.idx.store.qgr" % self.TYRANT_FILE)
            os.unlink("%s.idx.stock.dec" % self.TYRANT_FILE)
            os.unlink("%s.idx.id.lex" % self.TYRANT_FILE)
            os.unlink("%s.idx.color.tok" % self.TYRANT_FILE)
        except:
            pass

    def __init__(self, methodName="runTest"):
        unittest.TestCase.__init__(self, methodName)
        fields = [
            ("id", lambda _:_),
            ("store", lambda _:_),
            ("color", lambda _:_),
            ("price", lambda x:x), #TODO: See how to set as double
            ("stock", lambda _:_),
        ]
        raw_data = """
apple\tConvenience Store\tred\t1.20\t120
blueberry\tFarmer's Market\tblue\t1.12\t92
peach\tShopway\tyellow\t2.30\t300
pear\tFarmer's Market\tyellow\t0.80\t58
raspberry\tShopway\tred\t1.50\t12
strawberry\tFarmer's Market\tred\t3.15\t214
        """
        data = {}

        for line in raw_data.splitlines():
            f = line.split("\t")
            d = {}
            if len(f) < len(fields):
                continue
            for i in xrange(len(fields)):
                d[fields[i][0]] = fields[i][1](f[i])
            data[d["id"]] = d

        self.data = data

    def _set_test_data(self):
        self.t.update(self.data)

    def test_slices(self):
        q = self.q.order_by('id')
        # we use exclude() with different dummy conditions to make sure that
        # each query object is "clean", i.e. no cache is shared between it and
        # its anchestor
        assert 6 == len(q.exclude(a=123))
        assert 6 == len(q.exclude(a=456)[:])
        assert 6 == len(list(q.exclude(a=789)))
        assert q.exclude(a=135).order_by('id')[0][0] == 'apple'

        keys = 'apple blueberry peach pear raspberry strawberry'.split()
        def sliced(start=None, stop=None):
            return [k for k,v in q.exclude(a=246).order_by('id')[start:stop]]
        assert sliced(None, None) == keys[:]
        assert sliced(0, None) == keys[0:]
        assert sliced(None, 1) == keys[:1]
        assert sliced(0, 2) == keys[0:2]
        assert sliced(2, 4) == keys[2:4]

    def test_cache_chunks(self):
        keys = 'apple blueberry peach pear raspberry strawberry'.split()
        q = self.q.exclude(a=123).order_by('id')

        # multiple elems by slice
        def sliced(q, chunk_size, start=None, stop=None):
            q.set_chunk_size(chunk_size)  # this drops cache
            return [k for k,v in q.order_by('id')[start:stop]]
        assert sliced(q, 1, 2, 4) == keys[2:4]
        assert sliced(q, 2, 2, 4) == keys[2:4]
        assert sliced(q, 3, 2, 4) == keys[2:4]
        assert sliced(q, 4, 2, 4) == keys[2:4]
        assert sliced(q, 5, 2, 4) == keys[2:4]
        assert sliced(q, 3, 2, None) == keys[2:]
        assert sliced(q, 3, None, 2) == keys[:2]

        # single elem by index
        def get_item(q, chunk_size, index):
            q.set_chunk_size(chunk_size)  # this drops cache
            key, data = q.order_by('id')[index]
            return data
        assert get_item(q, 1, 0) == self.t[ keys[0] ]
        assert get_item(q, 1, 1) == self.t[ keys[1] ]
        assert get_item(q, 1, 2) == self.t[ keys[2] ]
        assert get_item(q, 2, 0) == self.t[ keys[0] ]
        assert get_item(q, 2, 1) == self.t[ keys[1] ]
        assert get_item(q, 2, 2) == self.t[ keys[2] ]
        assert get_item(q, 3, 1) == self.t[ keys[1] ]
        self.assertRaises(IndexError,
                          lambda: get_item(q, 3, 10) == self.t[ keys[1] ])

    def test_exact_match(self):
        #Test implicit __is operator
        apple = self.q.filter(id="apple")[:]
        assert len(apple) == 1
        assert apple[0][1] == self.data["apple"]

        #Test explicit __is lookup
        pear = self.q.filter(id__is="pear")[:]
        assert len(pear) == 1
        assert pear[0][1] == self.data["pear"]

        #Test many results
        shopway = self.q.filter(store="Shopway")[:]
        assert len(shopway) == 2
        for k, v in shopway:
            assert self.data[k]["store"] == "Shopway"
        #Test limit keys
        color = self.q.filter(color="red")[:1]
        assert len(color) == 1
        for k, v in color:
            assert self.data[k]["color"] == "red"
        #Test and query
        shopway_red = self.q.filter(color="red", store="Shopway")[:]
        assert len(shopway_red) == 1
        assert shopway_red[0][0] == "raspberry"
        #Test chained and filter
        shopway = self.q.filter(store="Shopway")
        shopway_red = shopway.filter(color="red")[:]
        assert len(shopway_red) == 1
        assert shopway_red[0][0] == "raspberry"
        #Test exclude
        shopway_not_red = shopway.exclude(color="red")[:]
        assert len(shopway_not_red) == 1
        assert shopway_not_red[0][0] == "peach"

    def test_numeric(self):
        #Numeric or decimal means integers. Search over floats or doubles are crazy
        bad_stock = self.q.filter(stock__lt=100)
        assert len(bad_stock) == 3
        for k, v in bad_stock:
            assert k in "blueberry pear raspberry".split()
        stock_300 = self.q.filter(stock=300)
        assert len(stock_300) == 1
        assert stock_300[0][0] == "peach"
        stock_58 = self.q.filter(stock__is=58)
        assert len(stock_58) == 1
        assert stock_58[0][0] == "pear"
        good_stock = self.q.filter(stock__gt=100)
        assert len(good_stock) == 3
        for k, v in good_stock:
            assert k in "apple peach strawberry".split()

        middle_stock = self.q.filter(stock__gte=58, stock__lte=120)
        assert len(middle_stock) == 3
        assert query_equals(middle_stock, "pear blueberry apple")

        middle_stock_between = self.q.filter(stock__between=[58, 120])
        assert list(middle_stock) == list(middle_stock_between)

        self.assertRaises(ValueError, lambda: list(self.q.filter(stock__between=[1])))
        self.assertRaises(ValueError, lambda: list(self.q.filter(stock__between=[1, 2, 3])))
        self.assertRaises(ValueError, lambda: list(self.q.filter(stock__between=['a', 'b'])))

    def test_string_contains(self):
        with_s = self.q.filter(id__contains="s")
        assert query_equals(with_s, "raspberry strawberry")

    def test_string_startswith(self):
        start = self.q.filter(id__startswith="pe")
        assert query_equals(start, "peach pear")

    def test_string_endswith(self):
        ends = self.q.filter(id__endswith="berry")
        assert query_equals(ends, "blueberry raspberry strawberry")

    def test_string_matchregex(self):
        regex = self.q.filter(id__matches=".ea.*")
        assert query_equals(regex, "peach pear")

    def test_token_eq_or(self):
        #Test string token
        yellow_blue = self.q.filter(color__in=["blue", "yellow"])
        assert query_equals(yellow_blue, "blueberry peach pear")

        #Test numeric token
        some_stocks = self.q.filter(stock__in=[12, 120])
        assert query_equals(some_stocks, "apple raspberry")

    def test_token_contains_or(self):
        market_store = self.q.filter(store__contains_any=["Market", "Store"])
        assert query_equals(market_store, "apple blueberry pear strawberry")

    def test_token_contains_and(self):
        store_convenience = self.q.filter(store__contains=["Store", "Convenience"])
        assert store_convenience[0][0] == "apple"

    def test_qgr_like(self):
        market = self.q.filter(store__like="market")
        assert query_equals(market, "blueberry pear strawberry")

        #Like is not like any
        market = self.q.filter(store__like="market store")
        assert len(market) == 0

    def test_qgr_like_all(self):
        store = self.q.filter(store__like="nience store".split())
        assert len(store) == 1
        assert store[0][0] == "apple"
        store = self.q.filter(store__like="market store".split())
        assert len(store) == 0

    def test_qgr_like_any(self):
        market_store = self.q.filter(store__like_any="market store".split())
        assert query_equals(market_store, "apple blueberry pear strawberry")

    def test_qgr_search(self):
        market_store = self.q.filter(store__search="market || store")
        assert query_equals(market_store, "apple blueberry pear strawberry")

        market_store = self.q.filter(store__search="market && store")
        assert len(market_store) == 0

    def test_exists(self):
        self.t['stray_dog'] = {'color': 'brown', 'name': 'Fido'}

        with_name = self.q.filter(name__exists=True)
        without_name_outer = self.q.exclude(name__exists=True)
        without_name_inner = self.q.filter(name__exists=False)
        with_name_dbl_neg = self.q.exclude(name__exists=False)

        expected_named = 'stray_dog'
        expected_unnamed = 'strawberry apple peach raspberry pear blueberry'

        assert query_equals(with_name, expected_named)
        assert query_equals(without_name_outer, expected_unnamed)
        assert query_equals(without_name_inner, expected_unnamed)
        assert query_equals(with_name_dbl_neg, expected_named)

        del self.t['stray_dog']

    def test_boolean(self):
        # make sure we can tell an edible missile from other kinds of missiles
        self.t['pie']  = {'type': 'missile', 'edible': True,  'name': 'Pie'}
        self.t['icbm'] = {'type': 'missile', 'edible': False, 'name': 'Trident'}
        assert query_equals(self.t.query.filter(edible=True), 'pie')
        assert query_equals(self.t.query.filter(edible=False), 'icbm')

        # boolean semantics are preserved when data is converted back to Python
        self.assertEquals(bool(self.t['pie']['edible']), True)
        self.assertEquals(bool(self.t['icbm']['edible']), False)

    def test_order(self):
        #Gets some fruits
        fruits = self.q.filter(id__in=["apple", "blueberry", "peach"])

        #Order by name
        named_fruits = fruits.order_by("id")
        assert named_fruits[0][0] == "apple"
        assert named_fruits[1][0] == "blueberry"
        assert named_fruits[2][0] == "peach"

        #Order by name desc
        named_fruits_desc = fruits.order_by("-id")
        assert named_fruits_desc[0][0] == "peach"
        assert named_fruits_desc[1][0] == "blueberry"
        assert named_fruits_desc[2][0] == "apple"

        #Order by stock
        stock_fruits = fruits.order_by("stock", numeric=True)
        assert stock_fruits[0][0] == "blueberry"
        assert stock_fruits[1][0] == "apple"
        assert stock_fruits[2][0] == "peach"

        #Order by stock desc
        stock_fruits_desc = fruits.order_by("-stock", numeric=True)
        assert stock_fruits_desc[0][0] == "peach"
        assert stock_fruits_desc[1][0] == "apple"
        assert stock_fruits_desc[2][0] == "blueberry"

    def test_values(self):
        assert self.q.values("color") == [u'blue', u'yellow', u'red']
        assert self.q.values("store") == [u'Shopway', u"Farmer's Market", u'Convenience Store']

    def test_stat(self):
        assert self.q.stat() == {u'color': 6, u'price': 6, u'id': 6, u'store': 6, u'stock': 6}
        self.t.clear()
        self.t["prueba"] = dict(color="rojo", precio="3")
        self.t["test"] = dict(color="red", price="3")
        assert self.t.query.stat() == {u'color': 2, u'price': 1, u'precio': 1}

    def test_operator_or(self):
        #TODO: Q | Q
        not_blue = self.q.filter(color="red") | self.q.filter(color="yellow")
        assert len(not_blue) == 5
        assert "blueberry" not in not_blue

        complex_or = self.q.filter(color="blue") | self.q.filter(store="Shopway")
        print complex_or
        assert len(complex_or) == 3

    def test_columns(self):
        q = self.q.filter(id="apple")
        assert q.columns("id", "store")[0] == dict(id="apple", store="Convenience Store")
        assert q.columns("id", "color")[0] == dict(id="apple", color="red")
        assert q.columns("price", "stock")[:] == [dict(price="1.20", stock="120")]

    def test_union(self):
        q_apple = self.q.filter(id="apple")
        q_pear = self.q.filter(id="pear")
        q_red = self.q.filter(color="red")
        def get_ids(q):
            res = q.columns("id")[:]
            return set([d["id"] for d in res])
        assert get_ids(q_apple.union(q_pear)) == set("apple pear".split())
        assert get_ids(q_apple | q_pear) == set("apple pear".split())
        assert get_ids(q_pear | q_red) == set("apple pear raspberry strawberry".split())

    def test_intersect(self):
        q_apple = self.q.filter(id="apple")
        q_pear = self.q.filter(id="pear")
        q_red = self.q.filter(color="red")
        def get_ids(q):
            res = q.columns("id")[:]
            return set([d["id"] for d in res])
        assert get_ids(q_apple.intersect(q_pear)) == set([])
        assert get_ids(q_apple & q_pear) == set([])
        assert get_ids(q_apple & q_red) == set(["apple"])

    def test_intersect(self):
        q_apple = self.q.filter(id="apple")
        q_pear = self.q.filter(id="pear")
        q_red = self.q.filter(color="red")
        def get_ids(q):
            res = q.columns("id")[:]
            return set([d["id"] for d in res])
        assert get_ids(q_apple.minus(q_pear)) == set(["apple"])
        assert get_ids(q_apple - q_pear) == set(["apple"])
        assert get_ids(q_red - q_apple) == set("raspberry strawberry".split())

    def test_delete(self):
        assert "apple" in self.t
        deleted = self.q.filter(id="apple").delete()
        assert "apple" not in self.t

    def test_count(self):
        q_red = self.q.filter(color="red")
        assert q_red.count() == 3
        del self.t["apple"]
        assert q_red.count() == 2

    def test_hint(self):
        q_apple = self.q.filter(id="apple")
        q_red = self.q.filter(color="red")
        assert "HINT" in q_red.hint()
        assert "HINT" in q_apple.hint()
Ejemplo n.º 6
0
class TestTyrant(unittest.TestCase):
    TYRANT_HOST = '127.0.0.1'
    TYRANT_PORT = 1983
    TYRANT_FILE = os.path.abspath('test123.tct')
    TYRANT_PID = os.path.abspath('test123.pid')
    TYRANT_LUA = os.path.dirname(__file__) + '/test.lua'

    def setUp(self):
        assert not os.path.exists(self.TYRANT_FILE), 'Cannot proceed if test database already exists'
        cmd = 'ttserver -dmn -host %(host)s -port %(port)s -pid %(pid)s -ext %(lua)s %(file)s'
        cmd = cmd % {'host': self.TYRANT_HOST, 'port': self.TYRANT_PORT,
                'pid': self.TYRANT_PID, 'file': self.TYRANT_FILE, 'lua': self.TYRANT_LUA}
        os.popen(cmd).read()
        self.t = Tyrant(host=self.TYRANT_HOST, port=self.TYRANT_PORT)
        self.t.clear() #Clear dirty data
        self.t.sync()
        self._set_test_data()

    def tearDown(self):
        del self.t
        cmd = 'ps -e -o pid,command | grep "ttserver" | grep "\-port %s"' % self.TYRANT_PORT
        line = os.popen(cmd).read()
        try:
            pid = int(line.strip().split(' ')[0])
        except:
            'Expected "pid command" format, got %s' % line

        #os.popen('kill %s' % pid)
        os.unlink(self.TYRANT_FILE)

    def _set_test_data(self):
        self.t["apple"] = dict(store="Convenience Store", color="red")
        self.t["blueberry"] = dict(store="Farmer's Market", color="blue")
        self.t["peach"] = dict(store="Shopway", color="yellow")
        self.t["pear"] = dict(store="Farmer's Market", color="yellow")
        self.t["raspberry"] = dict(store="Shopway", color="red")
        self.t["strawberry"] = dict(store="Farmer's Market", color="red")

    def test___contains__(self):
        assert "apple" in self.t
        assert "melon" not in self.t

    def test___delitem__(self):
        assert "apple" in self.t
        del self.t["apple"]
        assert "apple" not in self.t
        def fail():
            del self.t["melon"]
        self.assertRaises(KeyError, fail)

    def test___getitem__(self):
        assert self.t["apple"] == dict(store="Convenience Store", color="red")
        assert self.t["blueberry"] == dict(store="Farmer's Market", color="blue")
        def fail():
            return self.t["melon"]
        self.assertRaises(KeyError, fail)

    def test_get(self):
        assert self.t.get("apple") == dict(store="Convenience Store", color="red")
        assert self.t.get("blueberry") == dict(store="Farmer's Market", color="blue")
        assert self.t.get("melon", None) == None

    def test___len__(self):
        assert len(self.t) == 6

    def test___setitem__(self):
        assert self.t.get("apple") == dict(store="Convenience Store", color="red")
        self.t["apple"] = dict(store="Bah", color="yellow")
        assert self.t.get("apple") == dict(store="Bah", color="yellow")
        self.t["melon"] = dict(store="VillaConejos", color="green")
        assert self.t.get("melon") == dict(store="VillaConejos", color="green")

    def test_call_func(self):
        assert self.t.call_func("test_ext", "key", "value") == u"test: key=value"
        fake_func = lambda: self.t.call_func("invented_function", "key", "value")
        self.assertRaises(exceptions.InvalidOperation, fake_func)

    def test_clear(self):
        assert len(self.t) == 6
        self.t.clear()
        assert len(self.t) == 0

    def test_concat(self):
        self.fail("Code and doc revision needed")

    def test_generate_key(self):
        # test autoincrement
        assert '1' == self.t.generate_key()
        assert '2' == self.t.generate_key()

        # test UUID on server fail (the fail is faked by monkey-patching)
        real_genuid = self.t.proto.genuid
        def fake_genuid():
            raise ValueError
        self.t.proto.genuid = fake_genuid
        assert isinstance(self.t.generate_key(), uuid.UUID)
        self.t.proto.genuid = real_genuid

    def test_get_size(self):
        self.assertRaises(KeyError, lambda:self.t.get_size("melon"))
        assert self.t.get_size("apple") == 34 #More usefull in not table dbtype. 34 is magic

    def test_get_stats(self):
        stats = self.t.get_stats()
        assert stats["rnum"] == "6"
        assert stats["type"] == protocol.DB_TABLE
        assert self.t.db_type == protocol.DB_TABLE
        assert self.t.table_enabled == True

    def test_iterkeys(self):
        keys = set("apple blueberry peach pear raspberry strawberry".split())
        g = self.t.iterkeys()
        assert hasattr(g, '__iter__')
        assert not hasattr(g, '__len__')
        db_keys = set([key for key in g])
        assert keys == db_keys

    def test_keys(self):
        assert self.t.keys() == "apple blueberry peach pear raspberry strawberry".split() #BTree and Tables are ordered

    def test_iteritems(self):
        g = self.t.iteritems()
        assert hasattr(g, '__iter__')
        assert not hasattr(g, '__len__')
        lst = list(g)
        assert len(lst) == 6
        assert 'apple' in dict(lst)

    def test_items(self):
        assert dict(self.t.iteritems()) == dict(self.t.items())

    def test_itervalues(self):
        g = self.t.itervalues()
        assert hasattr(g, '__iter__')
        assert not hasattr(g, '__len__')
        lst = list(g)
        assert len(lst) == 6
        assert 'color' in lst[0]
        assert lst[0]['color'] == 'red'

    def test_values(self):
        assert dict(self.t.itervalues()) == dict(self.t.values())

    def test_update(self):
        assert "melon" not in self.t
        assert "tomatoe" not in self.t
        #Update from named params
        self.t.update(
            melon = dict(store="VillaConejos", color="green"),
            tomatoe = dict(store="Bah de Perales", color="red")
        )
        assert "melon" in self.t
        assert "tomatoe" in self.t
        self.t.clear()
        #Update from a key and value list
        self.t.update([
                ("melon", dict(store="VillaConejos", color="green")),
                ("tomatoe", dict(store="Bah de Perales", color="red"))
        ])
        assert "melon" in self.t
        assert "tomatoe" in self.t
        self.t.clear()
        #Update from another dict
        self.t.update(dict(
            melon = dict(store="VillaConejos", color="green"),
            tomatoe = dict(store="Bah de Perales", color="red")
        ))
        assert "melon" in self.t
        assert "tomatoe" in self.t

    def test_multi_del(self):
        assert len(self.t) == 6
        self.t.multi_del(["apple", "pear"])
        assert len(self.t) == 4
        assert "apple" not in self.t
        assert "pear" not in self.t

    def test_multi_get(self):
        fruits = self.t.multi_get("apple melon pear".split())
        fruits = dict(fruits)
        assert len(fruits) == 2
        assert "apple" in fruits
        assert "pear" in fruits

    def test_multi_set(self):
        self.t.multi_set(dict(
            melon = dict(store="VillaConejos", color="green"),
            tomatoe = dict(store="Bah de Perales", color="red")
        ))
        assert "melon" in self.t
        assert "tomatoe" in self.t
        assert self.t["melon"] == dict(store="VillaConejos", color="green")
        assert self.t["tomatoe"] == dict(store="Bah de Perales", color="red")

    def test_prefix_keys(self):
        fruits_a = self.t.prefix_keys("a")
        assert len(fruits_a) == 1
        fruits_p = self.t.prefix_keys("p")
        assert len(fruits_p) == 2
        fruits_p1 = self.t.prefix_keys("p", 1)
        assert len(fruits_p1) == 1
        fruits_m = self.t.prefix_keys("m")
        assert len(fruits_m) == 0

    def test_sync(self):
        #I don't know if sync system call is performed, but i can test if the
        # function call returns an error.
        self.t.sync()

    def test_query(self):
        pass

    def test_unicode(self):
        item_with_unicode_value = {'name': u'Андрей'}
        item_with_unicode_key = {u'имя': 'Andrey'}
        ascii_pk = 'primary key'
        unicode_pk = u'первичный ключ'

        self.t[ascii_pk] = item_with_unicode_value
        assert self.t[ascii_pk] == item_with_unicode_value

        self.t[ascii_pk] = item_with_unicode_key
        assert self.t[ascii_pk] == item_with_unicode_key

        self.t[unicode_pk] = item_with_unicode_value
        assert self.t[unicode_pk] == item_with_unicode_value